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Science News Archive January 2016 - Page 19


Page 19 of 31

Closer look reveals nematode nervous systems differ

Researchers have discovered significant differences in the number of neurons in nematode ventral cords across various species, suggesting that neuron number and anatomy may have evolved multiple times. This variation could lead to the development of more targeted nematicides to control plant-parasitic nematodes.

The S-stroke or I-stroke?

A research team from the University of Tsukuba found that the S-stroke is more efficient for middle and long distance swimming due to its ability to generate propulsive power with less physical exertion. In contrast, the I-stroke is better suited for short distances where speed over efficiency is prioritized.

SourceUniversity of Tsukuba·JournalJournal of Sports Sciences·DateJan 14, 2016

Odor biomarker for Alzheimer's disease

Researchers discovered a distinctive odor signature in mouse models of Alzheimer's disease that appears before significant brain pathology development, suggesting a non-invasive tool for early diagnosis. The odor profile may be related to the presence of an underlying gene rather than actual brain changes.

SourceMonell Chemical Senses Center·JournalScientific Reports·DateJan 14, 2016

New particle can track chemo

Researchers have discovered a way to light up a common cancer drug, allowing them to see where the chemo goes and how long it takes to get there. This breakthrough could lead to more personalized medicine and better understanding of how cells interact with drugs.

SourceOhio State University·JournalNature Nanotechnology·DateJan 14, 2016

Attention neuron type identified

Scientists at Karolinska Institutet have identified a cell type in the brain's frontal lobes that is integral to attention. Parvalbumin-expressing neurons were found to reflect animals' level of attention, with high activity associated with attentive states and low activity with inattentive states.

SourceKarolinska Institutet·JournalCell·DateJan 14, 2016

Drug curbs marijuana use, but with tough side effects

A new randomized controlled trial at Brown University found that combining the drug topiramate with psychological counseling significantly reduced marijuana use among young smokers. However, many participants struggled with the medication's side effects, leading to dropout rates of 60%. The study suggests that medications can help redu...

SourceBrown University·JournalAddiction Biology·DateJan 14, 2016

Seduced by the label

Research from the Cornell Food & Brand Lab found that smaller recommended serving sizes on nutrition labels can mislead consumers into purchasing more of unhealthy foods like cookies. Shoppers tend to ignore serving size differences and assume healthier products.

SourceCornell Food & Brand Lab·JournalJournal of the Association for Consumer Research·DateJan 14, 2016

Is suicide a tragic variant of an evolutionarily adaptive set of behaviors?

Research suggests that suicidal behavior may be a misguided expression of self-sacrificial tendencies, which are otherwise beneficial in eusocial species. The study identifies parallels between self-sacrifice in non-human species and human suicide, highlighting the importance of addressing underlying misconceptions about one's own value.

SourceAmerican Psychological Association·JournalPsychological Review·DateJan 14, 2016

Nanodevice, build thyself

Researchers used density functional theory to understand the self-assembly of porphine molecules on copper and silver surfaces. They found that weak van der Waals interactions were the largest contributor to molecule-surface interaction, and surface-mediated molecule-molecule interactions occurred at higher coverages.

SourceAmerican Institute of Physics·JournalThe Journal of Chemical Physics·DateJan 14, 2016

3-D mapping of entire buildings with mobile devices

ETH Zurich scientists develop software that uses optical means to create 3D models of entire buildings in just 10 minutes, outperforming infrared technology in sunlight. The method allows for detailed architectural features and potential applications include augmented reality, city tours, and self-parking cars.